Exception with invalid config will be shadowed

[Nachi Ueno]

Exception with invalid config will be shadowed.

We will get this error instead of the real cause.

2013-08-28 14:27:33.119 30987 INFO neutron.common.config [-] Config paste file: /etc/neutron/api-paste.ini
2013-08-28 14:27:33.120 30987 ERROR neutron.common.config [-] Unable to load quantum from configuration file /etc/neutron/api-paste.ini.
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config Traceback (most recent call last):
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/opt/stack/neutron/neutron/common/config.py", line 144, in load_paste_app
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config app = deploy.loadapp("config:%s" % config_path, name=app_name)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 247, in loadapp
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config return loadobj(APP, uri, name=name, **kw)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 271, in loadobj
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config global_conf=global_conf)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config global_conf=global_conf)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 320, in _loadconfig
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config return loader.get_context(object_type, name, global_conf)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 408, in get_context
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config object_type, name=name)
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 587, in find_config_section
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config self.filename))
2013-08-28 14:27:33.120 30987 TRACE neutron.common.config LookupError: No section 'quantum' (prefixed by 'app' or 'application' or 'composite' or 'composit' or 'pipeline' or 'filter-app') found in config /etc/neutron/api-paste.ini

https://github.com/openstack/neutron/blob/master/neutron/service.py#L97
should be improved for better exception handling.

[ZhiQiang Fan (aji-zqfan)]

this bug is duplicate with https://bugs.launchpad.net/neutron/+bug/1210236 which already assigned to Salvatore Orlando but with status=new

however, this bug description is more generic, so it may be better to assign it to Salvatore Orlando and mark 1210236 as duplicate

[Nachi Ueno (nati-ueno)]

Thanks! I set duplicate flag